public static LocalPersistenceHandler GetInstance()
{
if (_instance == null)
{
_instance = new LocalPersistenceHandler();
}
return(_instance);
}
public static LocalPersistenceHandler GetInstance()
{
if (_instance == null)
{
_instance = new LocalPersistenceHandler();
}
return _instance;
}
/// <summary>
/// Private constructor to insure that Controller is not created outside this class.
/// </summary>
private Controller()
{
session = Session.GetInstance();
localPersistence = LocalPersistenceHandler.GetInstance();
//Default when not logged on
session.RootFolderPath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "\\sliceofpie\\";
session.UserID = -1;
}
/// <summary>
/// Private constructor to insure that Controller is not created outside this class.
/// </summary>
private Controller()
{
session = Session.GetInstance();
localPersistence = LocalPersistenceHandler.GetInstance();
//Default when not logged on
session.RootFolderPath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "\\sliceofpie\\";
session.UserID = -1;
}
/// <summary>
/// Synchronizes a specific document to push changes to the server. If another user made changes meanwhile, a conflict arises and a difference view is displayed.
/// </summary>
/// <param name="document">The document content from the UI</param>
public void SyncDocument(FlowDocument document)
{
if (System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable())
{
//Metadata
//0: docid -> docid 11
//1: userid -> userid 11
//2: timestamp -> timestamp 12-12-2012 12:18:19
object[] metadata = LocalPersistenceHandler.RetrieveMetadataFromFile(session.CurrentDocumentPath);
int documentID = (int)metadata[0];
DateTime baseDocumentCreationTime = (DateTime)metadata[2];
//int folderID = (int)metadata[3];
StringBuilder sb = new StringBuilder();
string metadataString = Metadata.GenerateMetadataString(documentID, session.UserID, DateTime.UtcNow);//, folderID);
sb.Append(metadataString);
sb.AppendLine();
//generate xaml for the document
String xaml = System.Windows.Markup.XamlWriter.Save(document);
sb.Append(xaml);
//get the text from the document
String content = new TextRange(document.ContentStart, document.ContentEnd).Text;
String[][] responseArrays = null;
//connect to the websevice
using (ServiceReference.Service1Client proxy = new ServiceReference.Service1Client())
{
//push the current document
responseArrays = proxy.SyncDocument(session.UserID, documentID, session.CurrentDocumentPath, sb.ToString(), session.CurrentDocumentTitle, content);
}
if (responseArrays == null) //if there is no conflict
{
if (documentID == 0)
{
//connect to the websevice
using (ServiceReference.Service1Client proxy = new ServiceReference.Service1Client())
{
documentID = proxy.GetDocumentId(session.UserID, session.CurrentDocumentTitle);
}
}
//save document with new metadata - basedocument
localPersistence.SaveDocumentToFile(document, Metadata.ReplaceDocumentIDInMetadata(metadataString, documentID));
session.CurrentDocumentID = documentID;
}
else //if there is a conflict
{
gui.SetupMergeView(responseArrays);
}
}
else
{
//No web connection
}
}
/// <summary>
/// Pushes the merged document revision to the server to resolve the conflict.
/// </summary>
/// <param name="document">The document content from the UI</param>
public void SaveMergedDocument(FlowDocument document)
{
Object[] oldMetadata = LocalPersistenceHandler.RetrieveMetadataFromFile(session.CurrentDocumentPath);
int documentid = (int)oldMetadata[0];
int userid = session.UserID;
DateTime timestamp = DateTime.UtcNow;
//int folderid = (int)oldMetadata[3];
String metadata = Metadata.GenerateMetadataString(documentid, userid, timestamp);//, folderid);
String xamlContent = System.Windows.Markup.XamlWriter.Save(document);
String content = metadata + xamlContent;
using (ServiceReference.Service1Client proxy = new ServiceReference.Service1Client())
{
proxy.AddDocumentRevision(session.UserID, documentid, content);
}
localPersistence.SaveDocumentToFile(content, session.CurrentDocumentPath);
}
